{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947947387",
    "entityType": "Track",
    "nonce": "0x8e90be8c37a40206af1e073a2f9a7159a7f192c2862e4ded23ab9bf0a108bbdb",
    "signature": "0x61b45ae76198893ef251883ca74a0710cbeede9dd57a15d01336a45a3b5bbab37f093ee0a65913400aa592e72b927099ada1ffd168d145d2ba692707e22ac8721b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}