{
  "manageEntity": {
    "action": "Save",
    "entityId": "134131539",
    "entityType": "Track",
    "nonce": "0x8cdc06f6746cb104d1b2853905eb21a67f0a8bd9a27932ad9398485c69d72e96",
    "signature": "0x4fa105d1b2ddb2d31cd5b0dd824532149e60ad538c742a09f1adf32514cb148b04900ac24e7719070ff6ad4ecd6f8aa6213523ce7116f3ba2c9b91fb474c12aa1b",
    "signer": "0x248684AB6cBbC4EA81a5A157904D29140656A6d3",
    "userId": "265134428"
  }
}