{
  "manageEntity": {
    "action": "Save",
    "entityId": "104186710",
    "entityType": "Track",
    "nonce": "0x3b551c2b5ac4e04566c74d9b197dda174c36ff3682f922aa2f788eb58175c6c5",
    "signature": "0x8cdee48a3755f23e82454a5524068e537cde3eb0d1be6c5ddc78f8dc34b2ba5450ab9325fc7c44a0fa69e2a3c24b20650fd4e52b19c106ededee1cc67a85a7ca1b",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}