{
  "manageEntity": {
    "action": "Save",
    "entityId": "846768958",
    "entityType": "Track",
    "nonce": "0xd4e48cfa86cff12e0e265eff2b5e1c5551667984739dcdb445118393ac5dc96e",
    "signature": "0x6d84c55624f938a3b2087b395ea9f4cbc27fd6667489faaa43327f4dcc8b22ef23e4f012c8e11f1a34b4937da6a86e912dd6f41b3581951b5468bb343c4052991b",
    "signer": "0x261c17dd7171Ea18B7ffF1AbB7D0495fEa0dB0ad",
    "userId": "185086709"
  }
}