{
  "manageEntity": {
    "action": "Save",
    "entityId": "240346917",
    "entityType": "Track",
    "nonce": "0x670609250b1aa1de55bab90dff1f91928b0060fb9d3819f6679b0cdecc76ef54",
    "signature": "0x7b3d4c1d0e5a397f95a31119e5983493deb975bf18744a821a6102341524995f12a2f5fdb18d2c50cf5fd9db70e55a0e45e1b2f7059482fb635c7f13f463e6f51c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}