{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142711589",
    "entityType": "Track",
    "nonce": "0xa9890b63b9432d213c6090da3d45e634872db45ab3d9b11e484529c4b81bda53",
    "signature": "0xe530de6b44687e3be0ddb2239badbd090e346edec2aec7647ab993bca2a5dfc55f4b9421d02ea9b9ef2b9f58784fd7f2463dc183b836cd35371c12019ca24e8d1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}