{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138633081",
    "entityType": "Track",
    "nonce": "0xb310156be97518872806afa5c7bd77d5d38b1dc1c93476c51682b12b9038e800",
    "signature": "0xab1d8ea64638c269d2e6159074b43700f8c7e07e6bee80f66098d24a4f42f59565e1d70d694833705fe3b0587093d23eb83b686e30eadfcc64fad5dcb773328d1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}