{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393879954",
    "entityType": "Track",
    "nonce": "0xd428db452a497a7f47e89d25c9d45e68d0b9b0aa1e6cb55b6645c8df2c0adea8",
    "signature": "0x2b9029ccecbf304903adf8914c7780e77215265bf7ddaa991c30802adcf864f02e9b77e0566d8dd658722589bd1a902c3395942e6780e62db2a9f49d0888a1341b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}