{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077210",
    "entityType": "Track",
    "nonce": "0x583c8a17333c5bf607d6f76d52cc37c97118be5be28e7278832d47e08e869cdf",
    "signature": "0x906408f2f4f14898213bb3ccc13c00843ec6a9fdc7b325bbfd14b1bcc414d2900111e469a75b28a300b2e67279e4f7575ab8835ce900fc52728ae3559e721b041b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}