{
  "manageEntity": {
    "action": "Save",
    "entityId": "1596299758",
    "entityType": "Track",
    "nonce": "0x49c9e2cc4dd134a8ab4251e61d4e5d2f57a5dd0af5a09fd5268e6648edf72dd0",
    "signature": "0x2919ba19bcde2b6df143c966cb2a4b0025ceb7738d4cc4ad9eabbccd5410a02623d4b0e8c60bad53c694f126e23d77d1617135ce1cb3557419cb1f5a0805c0f41c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}