{
  "manageEntity": {
    "action": "Save",
    "entityId": "171903243",
    "entityType": "Track",
    "nonce": "0x4a36d5be47410943c74d655d441572a625258ba8f481effd23de3d7da10ac6f4",
    "signature": "0xd36f48b8b58a73661f1392bed08075dd6b3fe5c6c0e37ebfd2bfcd03dca4375d6c0ba0a8884f3a0a98083ed496abccf09181e7efcbd8bba8e29a5f640f2466921b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}