{
  "manageEntity": {
    "action": "Save",
    "entityId": "766611132",
    "entityType": "Track",
    "nonce": "0xfd9830022326eac40656b483ec8825127ff6293ce5e0a26f63f2664a41a310e8",
    "signature": "0x187f0e4e4d601f07467277ca00c488f423f541db03ab795d1214bfb4374a533368c23f73b4a3c187763b03801a5a1edcd44fc3405260861bc15418032a2c6ee51b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}