{
  "manageEntity": {
    "action": "Save",
    "entityId": "1059844",
    "entityType": "Track",
    "nonce": "0x25951447baf5d73786167c38208d413e9881e84dc95ac0edb56cac3fafb5aedc",
    "signature": "0xd3b83db505787eb65b5bcba5de166076e3d9411c64a4a3e97d0c19042d522ec0765dcdfa53c9ea4560977194e373ece006d7453342958d70d2109a4281f993e81b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}