{
  "manageEntity": {
    "action": "Save",
    "entityId": "72968925",
    "entityType": "Track",
    "nonce": "0x9185c3d4b4ccc4d4382ea2502d609831597bda73eba3764cb0b9f672c934f28f",
    "signature": "0xa428d719839bc3923039ffa28cdf2e3080c3ba278ed450269f8d7dc82ab954c07588b0d944b01fbb2507584c9930c8935e76ffcd57f6767a107de8d74f9278fc1b",
    "signer": "0xc28F39d473d5C4cacc612630A8798a119D1Bb506",
    "userId": "901788935"
  }
}