{
  "manageEntity": {
    "action": "Save",
    "entityId": "487913",
    "entityType": "Track",
    "nonce": "0x3eead72790be37ec661e1acc64d9944b3e70e342f0c30fcda50e202c23a7b33c",
    "signature": "0x72f06b1be61bb4dc6ff1bf16558a31cfd76deae7ece977bd821bdcf91fb7f4627581e8794e2030a8c0fb0f14f62914b0ed5121c266ebc7e46987f598bdac04301c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}