{
  "manageEntity": {
    "action": "Save",
    "entityId": "1270493268",
    "entityType": "Track",
    "nonce": "0x5c25d7e6e25f8abade8738e3dfcc1efc6ad7319b9cbbe7a3a2351fcd84476ce9",
    "signature": "0xd5d2786030812d5258c38e63dada1d73ae73bb9c162ee951f24372634e2ee8d813af71f2d35e8e93fd7b1a0faad859a64e242eb893a05842afde14636c8ba86f1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}