{
  "manageEntity": {
    "action": "Save",
    "entityId": "252566",
    "entityType": "Track",
    "nonce": "0xf801643f777e0404d059a28131f6dfecdb2a7bb777ee5373dbefc8059249861e",
    "signature": "0x7fa17f24946e9240a2b0c04fe9e353e534f23a18bdf3b5b98b3111e30c58eca839259f921588fde3d1f76b473781a53f688a1d245bfc26db9a6ad0de7183e1741c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}