{
  "manageEntity": {
    "action": "Save",
    "entityId": "427509645",
    "entityType": "Track",
    "nonce": "0x8903256512d3cf0d39fb1a1dd377a6f83c0e78bc9375b70f3a92dd8faf8476f6",
    "signature": "0x569f3bd63610edacf9c6a2716b644e3a8c08ac9280200d047d871b82fd206a5205467f95fddd3334b962eb1baf80789f97d00d32536eceb9143bbf820a0d3f4b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}