{
  "manageEntity": {
    "action": "Save",
    "entityId": "672888249",
    "entityType": "Track",
    "nonce": "0x887ea89571d247cfb512bc144359553abb3f6a626a3805344a1b7dd2c5351db5",
    "signature": "0xbc08eb38bc6f166eece6094b41ce2f132c91d49b88dfcba5dfc967f1dcce4b160d67c06828f52cae95efea8c9cad1985860ecd27735595bdf06100207c6770a11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}