{
  "manageEntity": {
    "action": "Save",
    "entityId": "525974308",
    "entityType": "Track",
    "nonce": "0xbef068c4fa13a21c1edfd1432c1d31c25af2bb6a71f7a85b5b92e63cac702d94",
    "signature": "0x8dc0ab1ccf822a0f4c8848f40c6ba6154ce3dc4bd5303f72363275d6b686adba2785fd789d50045ba3db6a86dfe2776afeb2d1418ecc7e54f2d3bf77d40e2d371c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}