{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416842477",
    "entityType": "Track",
    "nonce": "0x3a0c80fee94859db62c828f248d09564b43cb173fdc8cdc599a4249f3c45a8e9",
    "signature": "0xf4a1ac73f35254d91a38a5c64fc91d45609363f2712a93a31545c48c979ac4bd4cf779c86dd38e36d18d22f82bc57c2a7dd131a7a374cf11535e711bc846cab51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}