{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218729140",
    "entityType": "Track",
    "nonce": "0x0f05d0202b14316bc6f99c3318bfed14af0a92d34050807a87287bc51416ef34",
    "signature": "0x0f8811916a513b6666e45ef40f125751d018ea79b4e84c4597c10838389b67244c681b0ea9280457dfb318c0ec661d616049b155ccca8688bddf8f26892d47521b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}