{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908558841",
    "entityType": "Track",
    "nonce": "0xdc8be4f2fb80bbad40dc0df8c490351af3ae29713d9d22bf970d79b9adbc1ca2",
    "signature": "0x14d63272a53c2a30a479cae38d9a6fdacd23276a49780fada461cf01cda8889924d395dff1b4659fc3daf917f5f3694102dac5cff62a0596b2cc66098f42a8e31c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}