{
  "manageEntity": {
    "action": "Save",
    "entityId": "1813746503",
    "entityType": "Track",
    "nonce": "0x2c5113aa48e87590a9882259c91800401d8fb8677c2a1b8233d59e6615f1ccff",
    "signature": "0x8151658abedaf4cd2c1d00f0da8d948c1729445bae3ba793488043720331bb0a7a70cbe25710bce81c5927ffbe0ce2529b78c768f7c35f3627e553fef055b1cc1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}