{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262872499",
    "entityType": "Track",
    "nonce": "0xa4c6ac8073286ba8d488d988db174342aafee92611fa408c15a84e25679e52dd",
    "signature": "0x4f7d871cd49fc8b8eca9fcbd0e77f85f9b1669aada1f3b7f353856814592ae577678e9d6e48fc90b7414dfde429ee00b7b2706a2c4d55548d6d848d9a3b196c11b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}