{
  "manageEntity": {
    "action": "Save",
    "entityId": "364939343",
    "entityType": "Track",
    "nonce": "0x2250fe6f29077cbb4f6330f6d687d479134f7a0451de60c059a6983c9409f711",
    "signature": "0xecff51fc42cdbceb9763390157f4e522f4f97beed8f088e0fe72dcb30e93ed510d458d5c287d8bd11a75377129cfe77b460971e2b896e39a7adee71e5008c6411b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}