{
  "manageEntity": {
    "action": "Save",
    "entityId": "1583575382",
    "entityType": "Track",
    "nonce": "0xf0070a7f2718b6bde6e58dcf4b3d17ab2c2a4194a5f94a1894cc4ccf4c21fbbd",
    "signature": "0x4270b51b66b323eddff6936bdca3aed0e4b53c3296b000f60a48b2dfc0115ebd3e16ce736318c4786db7cbc4387aeaec4d3706898bc6c6518bfcf785e45ac91e1c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}