{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541139189",
    "entityType": "Track",
    "nonce": "0x0ac5ef87347ba227611d5cccf565490815f6a513888adec115151f0b671e1b36",
    "signature": "0xb6845873b1596c897dceb993d4040bcbb7725a6e7de14086f5ff56dbde04e82140d92ef54d022511d75b15b275407c69ad85a93fe549324f0fdc8633dcbee4a21b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}