{
  "manageEntity": {
    "action": "Save",
    "entityId": "546842852",
    "entityType": "Track",
    "nonce": "0x38ecd40dce1c3b75a3c8af6ee0232d6308a82151f1767cf0c2582bc51e3b28d7",
    "signature": "0x80ee1d1b5a97baeb3aa22a2fff9fd8119ead873e7725d28557cef4dab4f4f3e808abcd2abb481380c67fbe6eb337e45895258828befc93bff6f1322b44e3730a1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}