{
  "manageEntity": {
    "action": "Save",
    "entityId": "183418131",
    "entityType": "Track",
    "nonce": "0x409bbae1f167bbe6187c05a90b0106cec58643e8293e3ca8ef70a3217710fcb3",
    "signature": "0xd160780bc3aa7eb3345a053d22fe22cfb9ab18b53326cb796dab3d748115e1344a73b96d0af60c3a44c970dd1f7eb39cc6ba2b3f26af64a00f14c8f8e8fb5bde1c",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}