{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019557949",
    "entityType": "Track",
    "nonce": "0x2d431666f84aaf202e202b8c9da11904445be35755dd7acd825f0ae0a51b220a",
    "signature": "0xf80a29d5249d1dfb49cb665c52dee084810c7bcde43a5975a591a42cdcb559a70ba6a55ec15e66b5201315dcfb8ca8c5099da5467132f2591b6b8e8a5c0c79871b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}