{
  "manageEntity": {
    "action": "Save",
    "entityId": "652372",
    "entityType": "Track",
    "nonce": "0x49c439549d5db91bf73cef46ea4d9771b693773c22936ef5447f61158e309991",
    "signature": "0x44a2656ecdca640f00364535cce285df2f208a3fc2b03679418202731f1d37b764cc308589498fb4f27adb75d0b1ffc9a915b3617f557da931e4619c965863ab1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}