{
  "manageEntity": {
    "action": "Save",
    "entityId": "57776368",
    "entityType": "Track",
    "nonce": "0x78d9cf950f50f58f02f45cfa22f860790789134176cdf5e23d740afd6cebd287",
    "signature": "0xba6a4b94e95731d1da4d58d3ed8870090bca116e6bfaf470fd04920dddddeb9976357ebf34ba960de41e44ea60a19b468219b8c513d7985f30148c8852c13a4f1b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}