{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876287592",
    "entityType": "Track",
    "nonce": "0x1e60274bc64efe9a1812e440bd9cddca1391e3c6f994445ec3b6ddfa4f6ec8bd",
    "signature": "0x744d2800638ba3a2a45b8ca749b30b1296e07647377df32e25f70acd7e5ed817044a99fed3bb6427bf81e685e5b5f634c3f738f311b6687ab1f75463f0a886901c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}