{
  "manageEntity": {
    "action": "Save",
    "entityId": "261224",
    "entityType": "Track",
    "nonce": "0x81e7ddc69df261ffe2b9c5d33295a2953bb17598164d022b9379a5f561930a39",
    "signature": "0xb8ebb0f3f19551fd36ae1da11e1797470e04437f9734de93a619f48da64243a769033c2916fbe59acf546b277c29993751e0db716d2a28d2cbb97e428f6a33da1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}