{
  "manageEntity": {
    "action": "Save",
    "entityId": "695168731",
    "entityType": "Track",
    "nonce": "0xe10c8792dcf47ddffa16f63b2b91a9f9c2ca6accc4b2c31d24c4b449a9c5aeae",
    "signature": "0x1112dd3af224ec04a0bfbbe556b17b0586476e2d08383eeaf31bc6b565a8c2b0103db1ef8935ecfc6bccfad7423a44a32373eea7144e5c74fd9efc17f75d72151b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}