{
  "manageEntity": {
    "action": "Save",
    "entityId": "1812868384",
    "entityType": "Track",
    "nonce": "0x696568d7ac6694b60024ff01a3b7f49ee5b1057574785d3f3b9583b37ce3e9cd",
    "signature": "0xedf35fc0874ed677c37088c2da0f6e67569574a323a1340363e76a39e3d49fb06417f25d73f400b66bc1bbf5bd1928c9c6583036fbba303b6ae4a0bf189dce201c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}