{
  "manageEntity": {
    "action": "Save",
    "entityId": "487559",
    "entityType": "Track",
    "nonce": "0xf928bc3fb0042c789862a9376c86492cefdb1ec652ee045edade8e13de3d0bb5",
    "signature": "0xa64b1d7e6fa7f11052e9551d9284ded7289851f89791ba846691373e49747541656a29fb219ec969571f24e09d8e63104eb1bdc9660ea856f69bdd367ae94f271c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}