{
  "manageEntity": {
    "action": "Save",
    "entityId": "726850283",
    "entityType": "Track",
    "nonce": "0x294f95586b9c86aad37bcac9311150b53590898f0b603a65a095b3944ac9e54f",
    "signature": "0x8abfde37e496d3615fd3e2b274f22afadb4f191aa931d9c51c142ff432de081b55e85223f6a0aaa6264c499685ec95da4a9763a513f8322b4370adb108932dbe1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}