{
  "manageEntity": {
    "action": "Save",
    "entityId": "276680491",
    "entityType": "Track",
    "nonce": "0x8a3a6ccd3e6d535c80970966cd4fd82ff300734b9d82d2a06463abea715d3243",
    "signature": "0x2e123f1fa5b3611913954a1a33bf67713cd5166ed77f19b6af28a6a2cdd139a06d338dcd5ebd75326544e34c84fb31cd05ef8059c77575b3248e05107bfb33fc1c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}