{
  "manageEntity": {
    "action": "Save",
    "entityId": "468130493",
    "entityType": "Track",
    "nonce": "0xdf5c427c18a9b795b971688c0e34db0f311c0873d707299db33dac1a8260534f",
    "signature": "0x5bbf5b64bc01aa4e2620bd934eae1a8d222b0d780d28b430502cba529da82c612f5454166e5fe477091a1bd36408f913ad973cea3d0ac91d07bf440c98d99d8d1b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}