{
  "manageEntity": {
    "action": "Save",
    "entityId": "754926514",
    "entityType": "Track",
    "nonce": "0x95b072e53c16a04cca67b3bc065a3f9f3b149d4f22f9260547830c45fd9dca15",
    "signature": "0x7302507e431d6baa2c7a1827a4f2b9dbf340a0d23978b21e5a39169054e313264da2fbb0ad6c395d9934ceded51f9e19828591f80e8b855d92f4b0e77228f6891c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}