{
  "manageEntity": {
    "action": "Save",
    "entityId": "1943991027",
    "entityType": "Track",
    "nonce": "0x2e0868f0f34c1f8ef260e36f79280b29ad19346aa036d4f90d871b7fdc6e6dd4",
    "signature": "0x22a9c36203300ae0d53be2447fd6e32966affa37bcc7e45e33d9c7f256a30d8c7402c25aa652d4e5bd67fa8a4ac8f338736a2c3f7d322fda96328f766fc7f7901b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}