{
  "manageEntity": {
    "action": "Save",
    "entityId": "947591693",
    "entityType": "Track",
    "nonce": "0x581c5a8d8ccd790928f61573302fcd9e0b84f7ed5fd926168c5c709109dc66c6",
    "signature": "0xb4cafd690b3280af3bbfd4b285e9dc9855875869754cb243a47ce9d9fc5604c86c1f7f44217792d42a6cd6f8960d97d159ab3157e62fba10be5118ab1805321c1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}