{
  "manageEntity": {
    "action": "Save",
    "entityId": "480251",
    "entityType": "Track",
    "nonce": "0xb6465202f180ba336223c606a830c601a21ecb34e7b7017d0dcea9403f5239f8",
    "signature": "0x906d295107223a6f610d131d3444e19764148482189f07ecf2b1572f2e57181611958516bdc6951f129d8c39b7273e4e743a2f2e48410c18e67ce3dd4082232e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}